Bearing Fatigue Failure: Yuav ua li cas Rolling Contact Stress ua rau Cracks thiab Spalling

Kev qaug zog tsis ua hauj lwm tseem yog qhov tseem ceeb ua rau muaj kev puas tsuaj ntxov ntxov, lub luag haujlwm rau ntau dua 60% ntawm kev ua tsis tiav hauv kev lag luam. Rolling element bearings-xws li lub nplhaib puab, lub nplhaib sab nraud, cov khoom dov (pob los yog rollers), thiab lub tawb-ua haujlwm nyob rau hauv lub voj voog thauj khoom, nrog cov ntsiab lus dov tsis tu ncua xa cov rog ntawm cov nplhaib.

Vim qhov chaw sib cuag me me ntawm dov cov ntsiab lus thiab raceways, qhov tshwm simHertzian tiv tauj kev nyuaj siabyog siab heev, tshwj xeeb tshaj yog nyob rau hauv high-speed los yog hnyav-load tej yam kev mob. Qhov no concentrated kev nyuaj siab ib puag ncig ua rauqaug zog, manifesting li nto pitting, tawg, thiab nws thiaj li spalling.

Stress Fatigue yog dab tsi?

Kev ntxhov siab qaug zog hais txoglocalized kev puas tsuajtshwm sim los ntawm kev rov ua dua cyclic loading hauv qab cov khoom siv lub zog tensile kawg. Thaum lub bulk ntawmbearingtseem elastically deformed, microscopic zones ntsib cov yas deformation dhau sijhawm, thaum kawg pib ua tsis tiav. Cov txheej txheem feem ntau nthuav tawm hauv peb theem zuj zus:

1. Microcrack Initiation

• tshwm sim nyob rau hauv subsurface theem (0.1-0.3 hli hauv qab ntawm raceway nto).

• Ua los ntawm cyclic stress concentrations ntawm microstructural imperfections.

2. Ncua Kev Tshaj Tawm

• Cov kab nrib pleb maj mam loj tuaj raws txoj kev ntawm qhov siab tshaj plaws shear stress.

• Kev cuam tshuam los ntawm cov khoom tsis xws luag thiab kev ua haujlwm ntawm kev thauj khoom.

3. Kawg Fracture

• Kev puas tsuaj saum npoo yuav pom zoo lispalling or pitting.

• Thaum cov kab nrib pleb ncav cuag qhov loj me, cov khoom tshem tawm ntawm qhov chaw.

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Fatigue Considerations for Heavy-duty Electric Vehicles

In Cov khoom loj (LGVs)thiabtsheb thauj khoom hnyav(HGVs)-tshwj xeeb tshaj yog hluav taws xob variants - qaug zog kuj tseem ceeb heev vim:

• Wider RPM Range: Cov tshuab hluav taws xob ua haujlwm thoob plaws cov kab nrawm dua li cov tshuab hluav taws xob sib xyaw, ua kom muaj kev sib tw ntau zaus.

• Siab Torque Output: Hnyav torque kis tau tus mob yuav tsum tau bearings nrog txhim khu kev qaug zog.

• Roj teeb hnyav cuam tshuam: Qhov ntxiv loj ntawm traction roj teeb ua rau muaj kev ntxhov siab ntawm cov khoom siv tsav tsheb, tshwj xeeblog thiab lub cev muaj zog bearings.

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Cov Pab Koom Tes Tseem Ceeb rau Kev Nyuaj Siab

√ Hloov Loads

Bearings nyob rau hauv dynamic systems yog tas li raug mus rau txawvradial, axial, thiab dabtsi yog khoov loads. Raws li cov ntsiab lus dov tig, kev sib cuag kev ntxhov siab hloov mus rau ib puag ncig, tsim kom muaj kev ntxhov siab ntau dhau sijhawm.

√Khoom tsis zoo

Inclusions, micro-cracks, thiab voids nyob rau hauv cov khoom siv bearing tuaj yeem ua raws likev nyuaj siab concentrators, accelerating qaug zog pib.

√Lubrication tsis zoo

Tsis txaus los yog degraded lubrication ncekev sib txhuam thiab kub, txo qaug zog lub zog thiab nrawm hnav.

√Kev teeb tsa tsis raug

Misalignment, tsis raug fits, los yog dhau-tightening thaum lub sij hawm installation yuav qhia tau hais tias tsis npaj txhij txog kev nyuaj siab, compromising bearing kev ua tau zoo.

Kev nkag siab thiab txo qis kev ntxhov siab yog qhov tseem ceeb rau kev ua kom lub neej ua haujlwm ntev hauv kev xav tau cov ntawv thov-tshwj xeeb yog lub tsheb hnyav hluav taws xob. Txawm hais tias kev nce qib hauv cov khoom siv thiab kev simulation thev naus laus zis tau txhim kho kev qaug zog, tsim nyogbearing xaiv, installation, thiab tutseem yog qhov tseem ceeb rau kev ua tau zoo thiab kev ntseeg siab.

Kev koom tes nrog muaj kev paub bearing manufacturersmuaj peev xwm muaboptimized daws teeb meemrau koj daim ntawv thov tshwj xeeb. Yog tias koj qhov project xav tau kev ua haujlwm siab, qaug zog-resistantbearings, peb pab neeg no los pab nrogkev txhawb nqa thiab cov lus pom zoo ntawm cov khoom.

Yog tias koj xav tau ntau duabearingntaub ntawv, thiab bearing nug, txais tostiv tauj pebtau Quote & Technical Solution!